Abstract
A temperature-insensitive fiber-optic refractive-index sensor based on optically heated long-period grating (LPG) is presented. The LPG is manufactured in a short section of cobalt-doped optical fiber (COF), which can be thermally stabilized through a pump light. Two fiber Bragg gratings (FBGs) are manufactured in COF and single-mode fiber (SMF), respectively, to monitor the local sensor and surrounding medium temperature. Experimental results demonstrate that this fiber-grating-based miniature refractive-index sensor can efficiently eliminate temperature cross-sensitivity in the temperature range of 5 ∼ 60°C.
Original language | English |
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Article number | 6387666 |
Pages (from-to) | 2340-2345 |
Number of pages | 6 |
Journal | IEEE Photonics Journal |
Volume | 4 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Dec 2012 |
Keywords
- fiber-optic sensor
- long-period grating (LPG)
- Optical heating
- refractive-index sensor
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering